Chinese Space Science and Technology ›› 2018, Vol. 38 ›› Issue (3): 69-75.doi: 10.16708/j.cnki.1000-758X.2018.0027

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Optimal station keeping of geostationary satellites by electric propulsion

KUAI Zhengzhong1,2, SHEN Hongxin2, LI Hengnian2, HE Qingbo1,*   

  1. 1. Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei  230026, China
    2. State Key Laboratory of Astronautic Dynamics, Xi'an Satellite Control Center, Xi'an 710043, China
  • Received:2017-02-16 Revised:2017-12-22 Accepted:2018-03-14 Online:2018-06-25 Published:2018-03-06

Abstract:

Considering the longer control arc of electric propulsion and the no longer applied assumption of impulse, a linear time-varying model for dynamics of geostationary satellite by perturbations and an optimization method for long-term control strategy were derived. A high-precision dynamical model of mean orbital elements was introduced based on equinox orbital parameters, which is highly consistent with STK-HPOP model. An optimization model considering overall orbit east-west and south-north control, and an optimization solving method based on sequential quadratic programming were proposed. In the simulation example, the problem of station keeping within 4 weeks for geostationary satellites configured with two thrusters was studied. The results show that the proposed method could be used to optimize the long-term station keeping control strategy.

Key words:

"> geostationary satellites, station keeping, electric propulsion, optimal control strategy, sequential quadratic programming